Tallman’s father contacted Lafayette police Thursday to say he had not heard from his son, which was highly unusual. The department has entered Tallman into its system as a missing person and advised other state law enforcement agencies to be on the lookout for Tallman and his car, which has temporary license plates.

But after a weekend of searching for him, Tallman’s family said Monday morning they there still is no sign of where he might have gone.

“Nothing,” said Silvia Montz, Tallman’s aunt. “We’ve been passing out fliers in Longmont and Lyons, but so far nothing has turned up.”

Tallman is described as white with brown hair and hazel eyes, standing about 5-foot, 10-inches tall. He was last seen wearing black sweat pants with a white stripe down the side and a white North Face jacket.

Friends and family told police they do not believe Tallman intentionally ran away or took his own life.

Anyone with information about Tallman is urged to contact Lafayette police at 303-665-5571 or through Boulder County emergency dispatch at 303-441-4444. Information may also be provided to his friend Zalyn Lee by emailing TheDGAFLifer@gmail.com.